听力原文：Hu: Hi, John!John: G'day, Hu! How's it going？Hu: All right! But I'm having a bit

听力原文：Hu: Hi, John!

John: G'day, Hu! How's it going？

Hu: All right! But I'm having a bit of trouble finding some of the stuff I need.

John: Really! What're you looking for？

Hu: Well, I'm just trying to find out a bit about the use of steel in building construction. Have you any ideas？

John: Yeah! Well, speaking offhand, that should be straightforward enough. What about the library？ There's a database on computer, and most of the stuff you need is catalogued—you should be able to find it somewhere or other.

Hu: Yes—but that's the easy part! You then have to find the book you want on the shelves, and you often find that it' s out already.

John: I know what you mean! Then you have to line up to borrow it, if it's CTL.

Hu: CTL？ What's CTL？

John: It means "confined to library": you know—it means you can't take it out. You have to read it in the library.

Hu: It seems easy, doesn't it; but you have to reserve it, and then you may want to photocopy bits of it, or make notes — and there never seems to be enough time!

John: Hmm! In your shoes, I think I'd have a word with your tutor.

Hu: I think I'll do that! Thanks! See you later, Bye!

John: See yah! And good luck!

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A．The use of steel in building construction.

B．Computer usage.

C．Database on computer.

D．Building construction.